A 1.5km long road was built in 5 days (3/10), how many kilometers was built? (First write out the quantitative relationship to solve the problem, and then answer)
修一条长1.5km的路，5天修了(3/10)，修了多少千米？(先写出解决问题的数量关系，再解答)
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1.5 * (3/10)</gadget>
<output>0.45</output>

<result>0.45</result>