Fill in the nine numbers from 1 to 9 in the nine boxes below to make the equation true: □□*□□=□□*□□□=4234 What is the largest of these three two-digit numbers.
将1至9这九个数分别填在下面九个方框中，使等式成立：□□*□□=□□*□□□=4234这三个两位数中最大的一个是多少．
<result>73</result>