Xiao Wang planned to make 50 parts every day, but actually made 20 more parts per day than planned. As a result, he completed the task 6 days ahead of schedule. How many parts did Xiao Wang make in total?
小王计划每天做50个零件，实际上每天比计划多做20个，结果提前6天完成了任务，小王一共做了多少个零件？
<gadget id="calculator">6 * 50</gadget>
<output>300</output>

<gadget id="calculator">6 * 20</gadget>
<output>120</output>

<gadget id="calculator">300 + 120</gadget>
<output>420</output>

<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(1/50) * 50</gadget>
<output>1</output>

<gadget id="calculator">(1/50) * 20</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) - 1</gadget>
<output>-3/5 = around -0.6</output>

<gadget id="calculator">1 + (-3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">420 / (2/5)</gadget>
<output>1_050</output>

<result>1_050</result>