A road is 1500 meters long, 30% of it was repaired in the first week, and the same amount was repaired in the second week as in the first week. How many meters are left to be repaired?
一条公路长1500米，第一周修了30%，第二周修的和第一周同样多，还剩多少米没有修．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10) - (3/10)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_500 * (2/5)</gadget>
<output>600</output>

<result>600</result>