A canal was dug 25 meters on the first day, and the remaining (2/5) was dug on the second day. At this time, the remaining is equal to the dug. How many meters is this canal?
一条水渠，第一天挖了25米，第二天挖了剩下的(2/5)，这时剩下的与挖好的相等，这条水渠有多少米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 * (2/5)</gadget>
<output>10</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

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

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">15 / (1/10)</gadget>
<output>150</output>

<result>150</result>