Master Zhang made 175 parts in 5 hours, and Master Li made 252 parts in 7 hours. How many parts did Master Zhang and Master Li make together?
张师傅5小时做175个零件，李师傅7小时做252个零件．张师傅和李师傅每时共做多少个零件？
<gadget id="calculator">175 / 5</gadget>
<output>35</output>

<gadget id="calculator">252 / 7</gadget>
<output>36</output>

<gadget id="calculator">35 + 36</gadget>
<output>71</output>

<result>71</result>