A pile of 50 tons of coal is transported away (1/4) on the first day, the amount transported away on the second day is equal to the first day, and it is finished on the third day. How many tons are transported on the third day?
一堆煤50吨，第一天运走(1/4)，第二天运走的与第一天相等，第三天运完，第三天运走多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<result>25</result>