There are 5 elephants in the zoo, and each elephant eats about 350 kilograms of food a day. The breeder ordered 15 tons of food, how much is left after a week?
动物园里有5头大象，每头大象一天大约要吃350千克食物．饲养员预订了15吨食物，一个星期后还剩多少？
<gadget id="calculator">7 / 1_000</gadget>
<output>7/1_000 = around 0.007</output>

<gadget id="calculator">350 * 5 * (7/1_000)</gadget>
<output>49/4 = around 12.25</output>

<gadget id="calculator">15 - (49/4)</gadget>
<output>11/4 = around 2.75</output>

<result>11/4 = around 2.75</result>