What is the number made up of 3 ones, 4 tenths and 7 thousandths?
3个一，4个十分之一和7个千分之一组成的数是多少．
<gadget id="calculator">7 / 1_000</gadget>
<output>7/1_000 = around 0.007</output>

<gadget id="calculator">3 + 0.4 + (7/1_000)</gadget>
<output>3.407</output>

<result>3.407</result>