A and B each have some stamps, and B has 160 stamps. If A gives his (1/4) to B, then both have the same number of stamps. How many stamps does A have?
甲乙两人各有一些邮票，乙有160张，如果甲把自己的(1/4)给乙，则两人的张数一样的，原来甲有多少张邮票？
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

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

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

<gadget id="calculator">160 / (1/2)</gadget>
<output>320</output>

<result>320</result>