The two masters and apprentices produced a batch of parts. Two people divide the task according to 5:3. When completing the task, the master produced 250 parts. How many parts are there in total?
师徒两人生产一批零件．两人按5：3分担任务．完成任务时师傅生产了250个零件．这批零件共有多少个．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">250 / (5/8)</gadget>
<output>400</output>

<result>400</result>