The investment of a project is 200,000 yuan, saving 50,000 yuan compared with the plan. How much to save.
一项工程投资20万元，比计划节约5万元．节约多少．
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>