After rounding the two decimals to the ones place, the resulting values are 7 and 9, respectively. How many possible values are there for the integer part of the product of these two decimals?
将两个小数四舍五入到个位后，所得到的数值分别是7和9．这两个小数乘积的整数部分共有多少种可能的取值？
<result>15</result>