The human body contains a lot of water, with an average of 2100 grams of water per 3 kilograms of body weight. Xiaojun weighs 39 kilograms. How many grams of water does his body contain?
人体内含有大量的水分，平均每3千克体重中就含有2100克水，小军体重39千克，他全身大约含有多少克水？
<gadget id="calculator">2_100 / 3</gadget>
<output>700</output>

<gadget id="calculator">700 * 39</gadget>
<output>27_300</output>

<result>27_300</result>