How to change the number press using jquery?

You will need:
0. After clicking on the image:
1. Take the value of h1.text();
2. Convert it to a number explicitly or not, as you wish. ("operation-" perfectly translates the string to a number, if possible ;-) )
3. To make him anything and write back to h1.
Go for it.
The finished code will not give you anything.