Ouyang held two toys and weighed them together, they weighed 30 kilograms in total. Now that each toy weighs 2 kilograms, how much does Ouyang weigh?
欧阳抱着两个玩具一起称，共重30千克，现知每个玩具重2千克，欧阳体重是多少？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<result>26</result>