The road repair team built a 900km road, and 30% of it was repaired in the first week. How many kilometers were repaired in the first week?
修路队修一条900km的路，第一周修了30%，第一周修了多少km？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">900 * (3/10)</gadget>
<output>270</output>

<result>270</result>