There are 70 workers in a workshop, each of them can either play tennis or dance or both, now we know that there are 48 people who can play tennis, and 24 people who can play tennis and dance, how many people dance?
一个车间有70个工人，其中每个工人或者会打网球或者会跳舞或者两样都会，现在知道会打网球的有48人，会打网球又会跳舞的有24人，问跳舞的有多少人？
<gadget id="calculator">48 - 24</gadget>
<output>24</output>

<gadget id="calculator">70 - 24</gadget>
<output>46</output>

<result>46</result>