WordPress:How to centering reCAPTCHA of ContactForm7

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Recently, spam inquiries are increasing from the contact form, so we introduced reCAPTCHA.
We wrote down about how to centering elements of reCAPTCHA when use wordpress plugin ContactForm7.

/* Centering ContactForm7 reCAPTCHA */
.wpcf7-recaptcha > div {
    margin: 0 auto;
}