There are 2 elephants in the zoo, each elephant eats about 350 kilograms of food a day, the breeder reserves 5 tons of food, how many kilograms of food are left after a week?
动物园里有2头大象，每头大象一天大约要吃350千克食物，饲养员预订5吨食物，一个星期后食物还剩多少千克？
<gadget id="calculator">5 * 1_000</gadget>
<output>5_000</output>

<gadget id="calculator">2 * 350 * 7</gadget>
<output>4_900</output>

<gadget id="calculator">5_000 - 4_900</gadget>
<output>100</output>

<result>100</result>