The correct answer is:
Three hundred ten million, seven hundred sixty-three thousand, one hundred thirty-six.
Step-by-step explanation:
We start with the digits to the far left of the number. The first block of digits on the left is 310; we read this as "three hundred ten." The 0 in the 310 is in the millions place; this makes it "three hundred ten million."
The second block of digits is 763. We read this as "seven hundred sixty-three." The 3 in this block is in the thousands place; this makes it "seven hundred sixty-three thousand."
The last block of digits is 136. This is read as "one hundred thirty-six." Since the 6 is in the ones place, we can leave it as "one hundred thirty-six."
Together, we have "three hundred ten million, seven hundred sixty-three thousand, one hundred thirty-six."