4. \( \begin{array}{r}690 \\ \times \quad 52 \\ \hline\end{array} \)

Let’s break it down. First, multiply \(690\) by \(2\), which gives you \(1380\). Next, multiply \(690\) by \(50\) (or \(5\) and then add a zero), which results in \(34500\). Finally, you add those two results together: \[ 1380 + 34500 = 35880 \] So, \(690 \times 52 = 35880\). Now that's a wholesome, neat calculation!