Question

?
↓
Multiply by 308
↓
Multiply by 0.10
↓
Divide by 3
↓
462

Answer 1

Let ?=x
x ×308 ×0.10/3=462
x × 30.8/3=462
x × 30.8=462×3
x × 30.8=1386
x=1386/30.8
x=45


To Verify
45×308×0.10=1386
1386=1386

Answer 2

let x be the no..
>>>x/308×0.10/3=462
>>>10x/3×30800=462
>>>x=4268880