Find the pattern and fill in the numbers according to the pattern: 7, 3.5, 1.75, how much, 0.4375.
找规律，按规律填数：7、3.5、1.75、多少、0.4375．
<gadget id="calculator">1.75 / 2</gadget>
<output>0.875</output>

<result>0.875</result>