A and B each have an unknown number of stamps. If B gives A 10 stamps, then A has 6 times as many stamps as B; if A gives B 10 stamps, then A and B have the same number of stamps. How many stamps does A have?
甲、乙两人各有邮票不知其数，若乙给甲10张，则甲的邮票张数是乙的6倍；若甲给乙10张，则甲、乙两人的邮票张数相等．甲原有邮票多少张？
<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">60 + 20 + 10</gadget>
<output>90</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">90 / 5</gadget>
<output>18</output>

<gadget id="calculator">18 + 20</gadget>
<output>38</output>

<result>38</result>