Subtract five times 3.8 from 37.9, divide the difference by 0.9, what is the quotient?
从37.9里减去3.8的5倍，所得的差再除以0.9，商是多少？
<gadget id="calculator">3.8 * 5</gadget>
<output>19</output>

<gadget id="calculator">37.9 - 19</gadget>
<output>18.9</output>

<gadget id="calculator">18.9 / 0.9</gadget>
<output>21</output>

<result>21</result>