Processing a batch of parts, planned to finish in 10 hours, actually processed 6 more per hour than planned, and ended up completing the task 4 hours ahead of schedule, how many parts are there in total?
加工一批零件，计划10小时完成，实际每小时比计划多加工6个，结果提前4小时完成任务，这批零件共有多少个．
<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">6 * (3/2) * 10</gadget>
<output>90</output>

<result>90</result>