The production of a batch of parts is jointly completed by A and B. It was originally planned that A would make 60 more parts than B. As a result, B actually made 30 fewer parts than planned, and the total number of parts he made was 3 fewer than 4/7 of the total number A actually made. , the total number of parts in this batch.
生产一批零件由甲乙二人合作完成，原计划甲比乙多做60个，结果乙实际做的比计划少30个，他做的总数比甲实际做的总数的4/7还少3个，则这批零件共有多少个．
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">60 + 60</gadget>
<output>120</output>

<gadget id="calculator">120 - 3</gadget>
<output>117</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">117 / (3/7)</gadget>
<output>273</output>

<gadget id="calculator">273 - 120</gadget>
<output>153</output>

<gadget id="calculator">273 + 153</gadget>
<output>426</output>

<result>426</result>