B. illustrative Examples: Study the multi-rule map that shows how to multiply decimals step by step. Find the product of 3.89 x 0.75 Multiply: 3.89 X 0.75 - Multi-rule map steps 3.89 X 0.75 Math Rule 1: Write the decimal numbers vertically. 1 3.89 X 0.75 1945 2723 Math Rule 2: Multiply the decimal numbers like whole numbers. 1 3.89 X 0.25 1945 2723 2.9175 Math Rule 3: Add the partial products, Math Rule 4: Count the decimal places of the factors and put on the decimal point after the last decimal place. 3.89 x 0.75 1945 2723 2.9175 The product of 3.89 x 0.75 is 2.9175​