Grandma Li and Grandma Zhang went to buy breakfast together. Grandma Li bought 2 siu mai and 3 steamed buns, and Grandma Zhang bought 7 steamed stuffed buns. Both of them spent the same amount of money. The money for how many steamed buns is equal to the money for one Shaomai.
李奶奶和张奶奶一起去买早点，李奶奶买了2个烧卖和3个包子，张奶奶买了7个包子，两个人用去的钱一样多．多少个包子的钱等于1个烧买的钱．
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<result>2</result>