 Hello and welcome to the session. In this session we discussed the following question which says, find the product of the largest four-digit number and the largest six-digit number. So, we will find this product using the distributive law of multiplication over subtraction. So, first let's recall what is the distributive law of multiplication over subtraction. This is given as, if we have a, b, c are any three whole numbers, then we have a multiplied by b minus c is equal to a multiplied by b minus a multiplied by c. This is the key idea that we use for this question. Now, we move on to the solution. First of all let's find out which is the largest four-digit number. We have the largest four-digit number is equal to 9999 then the largest six-digit number is equal to back 99999. Now, we need to find the product that is 9999 multiplied by 999999. For this we will use the distributive law of multiplication over subtraction. So, we write this as 9999 multiplied by minus 1. Now, using the distributive law of multiplication over subtraction that is this law we get this is equal to 9999 multiplied by 10 lakhs minus 9999 multiplied by 1. So, this is equal to 9999 0 0 0 0 0 0 minus 9999 and this is further equal to 999899 0 0 0 1. So, we have the required product is equal to 999899 0 0 0 1. This is our final answer. This completes the session. Hope you have understood the solution of this question.