What is the number made up of 8 ones, 9 tenths, and 4 thousandths
由8个一，9个十分之一，4个千分之一组成的数是多少
<gadget id="calculator">4 / 1_000</gadget>
<output>1/250 = around 0.004</output>

<gadget id="calculator">8 + 0.9 + (1/250)</gadget>
<output>8.904</output>

<result>8.904</result>