Xiao Ming has 40 stamps, one more than half of Xiao Lin's. How many stamps does Kobayashi have? how many
小明有40张邮票，比小林的一半多1张．小林有多少张邮票？多少张
<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">39 * 2</gadget>
<output>78</output>

<result>78</result>