A 400-kilometer expressway has been built (3/5), how many kilometers are left to be repaired?
修一条400千米的高速公路，已经修了(3/5)，还有多少千米没有修？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">400 * (2/5)</gadget>
<output>160</output>

<result>160</result>