A square square with a side length of 100 meters, Kobayashi runs along the square for 5 weeks every day, about how many kilometers.
一个正方形的广场，边长100米，小林每天沿广场跑5周，大约跑多少千米．
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">100 * 4 * (1/200)</gadget>
<output>2</output>

<result>2</result>