A liquid medicine containing 8% medicine is 1000 grams, how many grams should be added to make the medicine content of this medicine water 20%?
一种含药量8%的药水1000克，要使此种药水含药量变为20%，应加药多少克？
<gadget id="calculator">8 / 100</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">1 - (2/25)</gadget>
<output>23/25 = around 0.92</output>

<gadget id="calculator">1_000 * (23/25)</gadget>
<output>920</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">920 / (4/5)</gadget>
<output>1_150</output>

<gadget id="calculator">1_150 - 920</gadget>
<output>230</output>

<result>230</result>