To multiply \( (5 \sqrt{19})(6 \sqrt{2}) \), we can follow these steps:
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Multiply the coefficients (the numbers outside the radicals): \[ 5 \times 6 = 30 \]
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Multiply the radical parts: \[ \sqrt{19} \times \sqrt{2} = \sqrt{19 \times 2} = \sqrt{38} \]
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Combine the products: \[ 30 \sqrt{38} \]
Thus, the exact answer is: \[ 30 \sqrt{38} \]