To donate to the disaster area, Xiaohua donated 4.2 yuan, 0.4 yuan more than Xiaoli, how much more Xiaohua donated than Xiaoli?
为灾区捐款，小华捐4.2元，比小丽多捐了0.4元，小华比小丽多捐几分之几？
<gadget id="calculator">4.2 - 0.4</gadget>
<output>3.8</output>

<gadget id="calculator">0.4 / 3.8</gadget>
<output>0.105263</output>

<result>0.105263</result>