400k->6000 = > 15
6k   ->50k   = > 8.333
If the ratio will fall again 1.8x then 8.333 / 1.8 = 4.629
So 50k * 4.29 = 214k, not 300k.

However, literally nothing proves that these numbers are correct and this is gonna happen. So it's a speculation, as worthless as any.