The master and apprentice process a batch of parts, the master processes 75%, 40 more than the apprentice, how many parts are there in total?
师徒加工一批零件，师傅加工了75%，比徒弟多加工40个，这批零件一共有多少个？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 / (1/2)</gadget>
<output>80</output>

<result>80</result>