Beatrix ate 21 raisins. this represents 30% of the box of raisins. how many raisins were originally in the box?

Beatrix was able to eat 21 raisins. Now, this 21 raisins is said to be 30% of the number of raisins inside the box.  T
he question is, how many raisins, will there be in total inside the box?
Equation and solutions: 
=> 30% = 30% / 100% = .31 
=> .31x = 21
=> .31x / .31 = 21 / .31
=> x = 67.8 total number of raisins inside the box, or let's convert it to whole number
=> 67.8 = 68 count 

The answer would be 24mm

The pie is multyplued by the second step