Grandma brings 100 yuan to the street to buy vegetables, the ratio of the money spent to the remaining money is 3:5, how much grandma spent.
奶奶带100元上街买菜，花的钱数与剩下的钱数之比是3：5，奶奶花了多少．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">100 * (3/8)</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>