Xiao Ming has some stamps, he gave half of the stamps to Xiao Hong, and Xiao Hong gave him five more. At this time, Xiao Ming has 50 stamps. How many cards did Xiao Ming have?
小明有一些邮票，他把邮票的一半多2张送给小红，小红又还给他五张，这时小明有50张．问小明原来有多少张？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">50 - 3</gadget>
<output>47</output>

<gadget id="calculator">47 * 2</gadget>
<output>94</output>

<result>94</result>