A batch of parts is evenly distributed to A and B for processing. The work-efficiency ratio of A and B is 5:3. After A completes, he helps B to do 30 more to complete the task. How many parts are there in total?
一批零件均分给甲、乙两人加工，甲、乙的工效比是5：3，当甲完成后，又帮乙做了30个才完成任务．这批零件一共多少个？
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) * 30</gadget>
<output>50</output>

<gadget id="calculator">30 + 50</gadget>
<output>80</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/3) * (1/2)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) - (1/2)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">80 / (1/3)</gadget>
<output>240</output>

<result>240</result>