英文的X万X千X百X十怎么说？？？

29800 twenty-nine thousand eight hundred
6700 six thousand seven hundred

以"87,654,378用英语怎么说"为例:

eighty-seven million six hundred and fifty-four thousand three hundred and seventy-eight

87654378
首先从右数每三位数字用逗号分段.
87,654,378
把每个逗号换成相应的词,从右数第一个逗号换成thousand,即千,第二个换成million,即百万,如果有第三个就换成billion,即十亿.
87 million 654 thousand 378
接下来替换每段数字:
如果是三位的,则是*(几) hundred and **(几十几\十几\几).
如654,six hundred and fifty-four.
378,three hundred and seventy-eight.
201,two hundred and one.
718,seven hundred and eighteen.
如果是首位为零(如76,054,004中的054和004),或是只有两位数字的(如87,654,378中的87),直接换成两位或一位数字.
如054,fifty-four.
004,four.
87,eighty-seven.
就可以了.

再给两个样例:
9,376,054,004----nine billion three hundred and seventy-six million fifty-four thousand four
82,341,154---eighty-two million three hundred and forty-one thousand one hundred and fifty-four

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