the unit digit in the product 4556 * 3432 * 4581 * 2784 is? Options: A) 8 B) 1 C) 2 D) 3 E) 4
<gadget id="calculator">4_556 * 3_432</gadget>
<output>15_636_192</output>

<gadget id="calculator">15_636_192 * 4_581</gadget>
<output>71_629_395_552</output>

<gadget id="calculator">71_629_395_552 * 2_784</gadget>
<output>199_416_237_216_768</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">199_416_237_216_768 - 8</gadget>
<output>199_416_237_216_760</output>

<gadget id="calculator">199_416_237_216_768 - 199_416_237_216_760</gadget>
<output>8</output>

<result>A</result>
the unit digit in the product 4556 * 3432 * 4581 * 2784 is?
subtract(multiply(multiply(multiply(4556, 3432), 4581), 2784), subtract(multiply(multiply(multiply(4556, 3432), 4581), 2784), add(const_4, const_4)))
unit digit in the given product = unit digit in 6 * 2 * 1 * 4 = 8 answer is a