wire is 150 meters long, and its (1/5) was used for the first time, and there are 10 meters more, and (5/4) of the first time was used for the second time, and the third (5/4) was used for the third time. The remaining half of the second time, how many meters are left in the end?
一根电线有150米长，第一次用去了它的(1/5)，还多10米，第二次用去了第一次的(5/4)，第三次用去了第二次剩下的一半，最后还剩多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">150 * (1/5)</gadget>
<output>30</output>

<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">40 * (5/4)</gadget>
<output>50</output>

<gadget id="calculator">150 - 40 - 50</gadget>
<output>60</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 * (1/2)</gadget>
<output>30</output>

<result>30</result>