Ihave 1 hundreds, 4 ones, 2 tens, and 1 tenths. what number am i?

1 hundreds, 4 ones, 2 tens, and 1 tenths = 124.1
The word and means decimal. Anything after the and is behind it. 

1 hundreds = 1 

2 tens = 2 

4 ones = 4 

and = decimal 

1 tenths =1

The 40 would include the shirt and on and on

There are two bc a studen that equals to 2