A barrel of oil is 330kg in total, the first use is the rest (3/8), how many kilograms was used for the first time?
一桶油共330kg，第一次用去的是剩下的(3/8)，第一次用去了多少千克？
<gadget id="calculator">3 + 8</gadget>
<output>11</output>

<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">330 * (3/11)</gadget>
<output>90</output>

<result>90</result>