A supermarket sells two different products at a price of 300 yuan each. As a result, one earns 10% and the other loses 10%. Does the store owner make a profit or a loss? How much money did you earn (lose)?
某超市两件不同的商品都以每件300元的价钱出售，结果一件赚10%，另一件赔10%，那么商店老板是赚了还是赔了？赚(赔)了多少钱？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">300 / (9/10)</gadget>
<output>1_000/3 = around 333.333333</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">300 / (11/10)</gadget>
<output>3_000/11 = around 272.727273</output>

<gadget id="calculator">300 - (3_000/11)</gadget>
<output>300/11 = around 27.272727</output>

<gadget id="calculator">(1_000/3) - 300 - (300/11)</gadget>
<output>200/33 = around 6.060606</output>

<result>200/33 = around 6.060606</result>