A factory planned to produce a batch of parts in 26 hours. Later, it produced 5 more parts per hour. In 24 hours, it not only completed the task, but also produced 60 more parts than the original plan. How many parts were originally planned to be produced?
某工厂计划26小时生产一批零件，后因每小时多生产5件，用24小时，不但完成了任务，而且还比原计划多生产了60件，问原计划生产多少零件？
<gadget id="calculator">24 * 5</gadget>
<output>120</output>

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

<gadget id="calculator">26 - 24</gadget>
<output>2</output>

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">30 * 26</gadget>
<output>780</output>

<result>780</result>