下面这些数字用英语怎么写?3个数字:1:620 2:3,200 3:700,000,000 thanks

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下面这些数字用英语怎么写?
3个数字:1:620 2:3,200 3:700,000,000 thanks

six hundred and twenty
three thoundsand two hundred
seven billion
注意and有没有,千与百之间没and

six hundred and twenty
three thousand and two hundred
seven million