In the value 9,443.2 we can spot two 4's.
One resides in the hundreds column and the other resides in the tens column.
The number of bricks= Total height of stack/ height of a single brick.
No. of bricks=3 1/2 ÷ 1 3/4
Convert the fractions into improper fractions;
No. of bricks= 7/2÷7/4
No. of bricks=

No. of bricks= 2
You need to multiply the four numbers and then takeway
First let you know what to do. OK. Going to drag a ruler. Across the paper. Vertically. And if it touches 2 points on the grid. Then it fails the test.