Aunt Zhao's money is just enough to buy 100 kilograms of apples. She found that the price of pears was only half of that of apples, so she spent half of the money to buy pears. Can she buy a few kilograms of pears? how many kilograms
赵阿姨的钱刚好够买100千克苹果．她发现梨的价钱只有苹果的一半，就拿出一半的钱去买梨，能买梨单数千克？多少千克
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">100 - 50</gadget>
<output>50</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<result>100</result>