Fill in the blank (_) in the following sentence from the following choices.
Sentence: I used the computer instead of the calculator to do my math work because the _ was running slower.

Choice 1: I used the computer instead of the calculator to do my math work because the calculator was running slower.
Choice 2: I used the computer instead of the calculator to do my math work because the computer was running slower.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.