There is a batch of computers in the Xincheng shopping mall, 50 of which were sold in February this year, and 25% of the total was sold in March. At this time, the ratio of the number of computers sold to the number of remaining computers is 1:1. How many computers are there in this batch?
新城商场有一批电脑，今年2月份卖出50台，3月份卖出总数的25%，这时，已卖台数与剩下台数的比是1：1，这批电脑有多少台？
<gadget id="calculator">1 + 1</gadget>
<output>2</output>

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

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">50 / (1/4)</gadget>
<output>200</output>

<result>200</result>