A bundle of wires is 400 meters in total, 2/5 of the total length is used for the first time, and the remaining 30% is used for the second time. How much rice is left at this time?
一捆电线共400米，第一次用去总长的(2/5)，第二次用去余下的30%．这时还剩多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">400 - 160</gadget>
<output>240</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">240 * (3/10)</gadget>
<output>72</output>

<gadget id="calculator">400 - 160 - 72</gadget>
<output>168</output>

<result>168</result>