mfrow function not found

Error in mfrow(2, 2) : could not find function "mfrow"

Is there a certain package I need to import? It cannot find the function.
here is my code:
plot(lm(data_flae_vol))
par(mfrow=c(2,2))

par(mfrow(2,2)) # your error message
#> Error in mfrow(2, 2): could not find function "mfrow"
fit <- lm(mpg~drat,data=mtcars)
par(mfrow = c(2,2)) # your code example
plot(fit)

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