Answer:
Six and three hundred twenty-four thousandths.
Underline digit:
; two-hundredths.
Explanation:
We are asked to write the number name and tell the value of the underline digit.

First of all, we will find place value of each digit.
Ones: 6
Tenths: 3
Hundredths: 2
Thousandths: 4
Therefore, our given number would be six and three hundred twenty-four thousandths.
Underline digit is at hundredths place, therefore, its value would be
.