There are currently 460 parts. Master Li makes x parts per hour and finishes in 3 hours. Master Wang makes 40 parts per hour and finishes in 4 hours. How many parts does Master Li make per hour? (equation solution)
现有460个零件，李师傅每小时做x个零件，3小时做完，王师傅每小时做40个，4小时做完．李师傅每小时做多少个零件？(方程解答)
<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<gadget id="calculator">460 - 160</gadget>
<output>300</output>

<gadget id="calculator">300 / 3</gadget>
<output>100</output>

<result>100</result>