(2.7×6.78+6.78×7.2)÷0.99 The product of numbers a and B is 0.44. If the number a is 5 times larger, then the product of numbers a and B is 0.44（

(2.7×6.78+6.78×7.2)÷0.99
=(2.7×7.2)×6.78÷0.99
=9.9×6.78÷0.99
=10×6.78
=67.8

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