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 ?
As many times as it happens.
118 times
19 times
Exactly 1 and a 1/2 times
9 times, remainder 1
Ten times 10/1=10
150 times ...
5 times with remainder 1.
1000 times
1 goes into 81 81 times.