New Living Translation
I heard the size of their army, which was 200 million mounted troops.

American Standard Version
And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.

Berean Study Bible
And the number of mounted troops was two hundred million; I heard their number.

Douay-Rheims Bible
And the number of the army of horsemen was twenty thousand times ten thousand. And I heard the number of them.

English Revised Version
And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.

King James Bible
And the number of the army of the horsemen were two hundred thousand thousand: and I heard the number of them.

World English Bible
The number of the armies of the horsemen was two hundred million. I heard the number of them.

Young's Literal Translation
and the number of the forces of the horsemen is two myriads of myriads, and I heard the number of them.

Revelation 9:16 Additional Translations ...