A person has a certain amount of money, half of it is used for the first time, and the remaining half is more than 50 yuan for the second time, and there is still 125 yuan left in the end. How much money does this person have originally?
某人有钱若干元，第一次用去了全部的一半，第二次用去了余下的一半多50元，最后还剩下125元，问这个人原先有多少钱？
<gadget id="calculator">125 + 50</gadget>
<output>175</output>

<gadget id="calculator">1 / 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">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">175 / (1/4)</gadget>
<output>700</output>

<result>700</result>