Irina thinks of $ 460 \div 2$ as an area problem: >  She splits the rectangle into parts that are easily divisible by $2$: >  **Fill in the blanks.** $\purple{a}=$ [[☃ math-keypad 1]] units $\blue{b}=$ [[☃ math-keypad 2]] units $w = $ [[☃ math-keypad 3]] units $460 \div 2 =$ [[☃ math-keypad 4]]