Xiaohong's weight is 40 kg, which is 10 kg more than (2/3) of Xiaodong's weight. How much is Xiaodong's weight in kilograms?
小红体重40千克，比小东体重的(2/3)多10千克，小东体重是多少千克？
<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 / (2/3)</gadget>
<output>45</output>

<result>45</result>