If this love and war between Russia and Russia becomes bigger then World War 3 can happen if it is natural that different countries will get involved in it. However, Bangladesh's 460 billion seems to be the current GDP in that case, even if the GDP has increased a little, it is not a cause for relief.
The war that Russia unleashed with its large-scale invasion of Ukraine in February 2022 has significantly increased the arms race in most countries, especially the United States and Europe. In Russia itself, all defense enterprises are now working around the clock and at full capacity. The production of military products has also been established at enterprises that previously specialized in the manufacture of civilian goods. As the Kremlin repeatedly threatens NATO member states, it is also modernizing its armed forces and allocating more funds to purchase weapons that have performed well in the war in Ukraine. On the one hand, this increases employment, but on the other hand, it practically does not contribute to an increase in GDP, since military products are almost immediately destroyed during military operations.
Your opinion is wrong that if other countries are drawn into this war, it will lead to the Third World War. If Ukraine is not helped, it will be conquered by a stronger Russia, after which Russia will certainly attack the Baltic countries - Latvia, Lithuania and Estonia. At the same time, Russia will force Ukrainians to fight on its side. Therefore, evil, if not stopped in time, will grow throughout the world. Other authoritarian states such as North Korea, Iran, China will take advantage of the weakness of democracy and also begin their wars of conquest. Then this will lead to the Third World War.