Xiao Ming and Xiao Hong weigh 78 kg together, Xiao Ming weighs 8 kg more than Xiao Hong, how much does Xiao Hong weigh?
小明和小红共重78千克，小明比小红重8千克，小红重多少千克．
<gadget id="calculator">78 - 8</gadget>
<output>70</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">70 / 2</gadget>
<output>35</output>

<result>35</result>