A number is composed of 4 billion, 7.05 million and 32 ones. How much should this number be written?
一个数由40个亿，705个万和32个一组成，这个数写作多少．
<gadget id="calculator">705 * 10_000</gadget>
<output>7_050_000</output>

<gadget id="calculator">4_000_000_000 + 7_050_000 + 32</gadget>
<output>4_007_050_032</output>

<result>4_007_050_032</result>