A silkworm spins silk about 1,500 meters, and Xiao Ming raises 4 silkworms, about how many kilometers can spin silk.
一条蚕大约吐丝1500米，小明养了4条蚕，大约可以吐丝多少千米．
<gadget id="calculator">4 / 1_000</gadget>
<output>1/250 = around 0.004</output>

<gadget id="calculator">1_500 * (1/250)</gadget>
<output>6</output>

<result>6</result>