$A = 1000, B = 1.2$
$A\times B = C (1000\times 1.2 = 1200)$
$X\times C = A (? \times 1200 = 1000)$
Need to find $X$ every time I change $A$ or $B$. Probably there is formula that is able to solve this since the only way I know how to do it is hilariously ignorant and slow.
How do i ask a calculator to do that (: ? Preferably one with syntax I can use with Excel or google.
Thx in advance.