How do you know where to place the decimal point in the quotient when dividing decimals by a whole number

Suppose, we are given

step-1: Firstly, we will get rid of decimals from numerator by multiply numbers

Here , we have decimal before one digit

so, to get rid of that decimal

we will have to multiply both top and bottom by 10

step-2:

now, we can divide it using division

and then we  will get decimal accordingly

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine