The area of a trapezoid is 1400 square meters and the height is 50 meters. If the meters of the two bases are integers and divisible by 8, find the two bases. What is the number of groups to solve this problem.
一梯形面积为1400平方米，高为50米，若两底的米数都是整数且可被8整除，求两底．此问题解的组数是多少．
<result>3</result>