2. (3 points) A student, while solving a calculation problem, was supposed to divide by 20 in the last step, but mistakenly added 20, thus obtaining an incorrect result of 180. What should the correct answer to this calculation problem be? $\qquad$ .
2. (3 points) A student, while solving a calculation problem, should have divided by 20 in the last step, but mistakenly added 20, resulting in an incorrect answer of 180. What should the correct answer to this calculation problem be? $\qquad$ .

【Solution】Let the result before the last step be $a$,
$$
a+20=180 \text {, }
$$

then: $a=180-20=160$;
The correct calculation result is: $a \div 20=160 \div 20=8$;
Therefore, the answer is: 8.