1
The "exponent" tells you how many times the same number, that is multiplied by itself, appears in the multiplication. In this case, just count how many times the number "1" appears.
How many times does 19 go into 1 ?
20 times
As many times as it happens.
118 times
19 times
Exactly 1 and a 1/2 times
1 goes into 52, 52 times.
9 times, remainder 1
Ten times 10/1=10
150 times ...
1000 times