The fourth grade students donated 250 yuan to the disaster area, the fifth grade donated more than the fourth grade (1/5), the sixth grade donated less than the fifth grade (1/10), how much did the sixth grade donate?
四年级同学向灾区捐款250元，五年级比四年级多捐款(1/5)，六年级比五年级少捐款(1/10)，六年级捐款多少元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / 10</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">250 * (6/5) * (9/10)</gadget>
<output>270</output>

<result>270</result>