Dad's weight is 60 kg, and my weight is dad's (2/3), which is 10 kg heavier than my sister. How many kilograms does your sister weigh?
爸爸的体重是60千克，我的体重是爸爸的(2/3)，比妹妹重10千克．妹妹的体重是多少千克？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<result>30</result>