I think you just did.
Not sure what you are asking. "55.34524" IS expressed numerically.
85,000,000,000.00
200,000,000
165,100,000,000.
10,614,000,000
7,000,000
It is: 245,510,000,000
1,100
1000*1000 = 1,000,000. or, one million.
1,244,000,000 or 1.244 x 109 or to keep it 1224 million you can express it as: 1224 x 106
To numerically write 13.1 million, you express it as 13,100,000. This is done by taking 13.1 and multiplying it by 1,000,000. The result is a whole number representing 13.1 million.
You can write it numerically like that or express it in kanji (八十六 / hachijyuuroku).