find the product ot the greatest4-digit number and the greatest 3-digit number (use distributive property to solve)

**The greatest 4 - digit number is 9999.**

**The greatest 3 - digit number is 999.**

**So, the product of these two numbers using distributive property **

**= 9999 * 999**

**= 9999 * [ 900 + 99 ]**

**= 9999 * 900 + 9999 * 99**

**= 8999100 + 989901**

**= 9989001**

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