The Shengli engineering team repaired a canal, 150 meters in the first week, exactly 30% of the repair. How many meters are left unrepaired?
胜利工程队修一条水渠，第一周修了150米，正好修了30%．还剩下多少米没有修？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">150 / (3/10)</gadget>
<output>500</output>

<gadget id="calculator">500 - 150</gadget>
<output>350</output>

<result>350</result>