The school shipped 1,000 sets of desks and chairs, 35 sets for each class, 18 classes have been placed, how many sets are left?
学校运来1000套桌椅，每班放35套，已经放了18个班，还剩多少套？
<gadget id="calculator">35 * 18</gadget>
<output>630</output>

<gadget id="calculator">1_000 - 630</gadget>
<output>370</output>

<result>370</result>